Fig. 14

Core and rim compositions in Hole 735B augite Mg# and plagioclase anorthite content. a, b Distribution plots for augite and plagioclase cores and rims, respectively. Data are from Dick et al. (2001), and Angeloni and Dick (1990) for troctolite dikes in the upper 550 m of the hole. c, d Plots of core vs rim Mg#’s for augite and core and rim anorthite percent for plagioclase. Black lines show 1:1 proportion of augite Mg# (100 × Mg/[Mg + Fe]) and plagioclase anorthite content. Except for the troctolites, core-rim data are not generally available for the upper 550 m of Hole 735B